I can't, it distracts me. I'll try to read Junjou Romantica online and I'll think I'm reading and stuff and turn like 3 pages. Once I finally turn the music off I'm like, "Where the heck am I? What just happened? Omg pls stahp it." So yeaaah

Depends how I feel. Last night I was reading Bunny Drop vol 1, and didn't listen to music. Today, I read vol 2, while listening to some Kpop. If I do listen to music while reading manga. It's been mostly Japanese and/or Korean music.

I've tried it. But its hard for me to concentrate on the story. Especially when the music is different from a given situation. Its like listening to an anime with a soundtrack that doesn't fit. I like symphonic metal such as Nightwish and Within Temptation. Their music sounds good when reading a dramatic chapter so I go with that.